*Wireless bluetooth V4.1 headset

*Support: A2DP/AVRCP/HFP/HSP

*Working distance: 10m

*Battery capacity: 650mAh 3.7v

*Charging time: about 2h

*Speaker size: Φ40mm *8.5 mm(H)

*Speaker sensitivity:98dB±3dB at 1KHz

*Speaker impedance:32±15% OHMS

*Speaker response frequency: 20Hz-20KHz

*Mic size: Φ4.0mm * 1.5mm(H)

*Mic sensitivity: -42±3 dB

*Mic impedance: 2.2KOHMS

*Mic frequency response:100~10KHz

*Total Harmonic Distortion:  ≦ 5%/10%(Speaker/Mic)

*3-Button easy CONTROL on music, calls, audio books & FM: quickly connecting with Bluetooth V4. 1 to your phones, you can operate all the audio and call function directly on the headphones without touching your cellphones to enjoy your things. 

*Rotatable space-saving design with travel Carrying bag & proper tightness in light weight for comfort: Take it to anywhere with the included carrying bag. The ergonomic design, comfy memory protein earmuff and the adjustable metal slider reduces pressure on ear and fit head perfectly. 

*Hands free calling: Built-in microphone lets you pick up any incoming calls conveniently. No need to worry about missing any phone calls. 

*Stable compatibility & easy to use: compatible with most Bluetooth devices. Quickly and stable connecting with your smartphones, MP3, iPad, PC, laptop and so on.